A Receipt records action identity, idempotency key, type, time, outcome, optional artifact evidence, provider detail, operation ID, and trace ID. It states what the executor reports happened.
A VerificationResult references the exact action and receipt, then records an independent official_api_readback or artifact_digest_reread, evidence, time, and result. It states what a separate observation found.
Verification must match receipt identity and artifact lineage. A receipt alone is not verification; a successful API response without a persisted receipt is not durable proof; a screenshot without identifiers is not replayable evidence.
The vertical-slice validator in src/lib/verticalSliceEvidence.ts checks approval, command, claim, receipt, verification, trace, digest, and replay consistency. See Evidence runbook. Last modified on August 28, 2026
